<template>
	<view>
    <!-- 这是自定义组件 -->
    <!-- <my-search :bgcolor="'pink'" :radius="2"></my-search> -->
    <!-- 自定义事件 -->
    <my-search @Myclick="gotoSearch"></my-search>
		<view class="scroll-view-container">
      <!-- 左侧的滚动区域 -->
		  <scroll-view scroll-y class="left-scroll-view" :style="{height:wh+'px'}">
        <!-- <view class="left-scroll-view-item active">xxx</view> -->
		    <!-- <view class="[left-scroll-view-item,active]">xxx</view> -->
        <!-- block是一个包裹性的容器，不会被渲染到页面 -->
        <block v-for="(item,i) in cateList" :key="i">
          <view :class="['left-scroll-view-item',i===active?'active':'']" @click="activeChanged(i)">
            {{item.cat_name}}
          </view>
        </block>
		  </scroll-view>
      <!-- 右侧的滚动区域 -->
      <scroll-view scroll-y class="right-scroll-view" :style="{height:wh+'px'}" :scroll-top="scrollTop">
        <!-- 二级分类 -->
        <view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
          <view class="cate-lv2-title">
           / {{item2.cat_name}} /
          </view>
          <!-- 三级分类 -->
          <view class="cate-lv2-list">
            <!-- 三级分类的item项 -->
            <view class="cate-lv2-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)"> 
              <image :src="item3.cat_icon" ></image>
              <text>{{item3.cat_name}}</text>
            </view>
          </view>
        </view>
      </scroll-view>
		</view>
	</view>
</template>

<script>
  import badgeMix from "@/mixins/tabbar-badge.js"
	export default {
    mixins:[badgeMix],
		data() {
			return {
				wh:0,
        cateList:[],
        active:0,
        cateLevel2:[],
        // 滚动条距离顶部的距离
        scrollTop:0
			};
		},
    onLoad(){
      //获取当前系统的消息
      const sysInfo=uni.getSystemInfoSync()
      // console.log(sysInfo)
      this.wh=sysInfo.windowHeight-50
      this.getCateList()
    },
    methods:{
     async getCateList(){
        const {data:res} =await uni.$http.get('/api/public/v1/categories')
        if(res.meta.status!==200)return uni.$showMsg()
        this.cateList=res.message
        this.cateLevel2=res.message[0].children
      },
      activeChanged(i){
        this.active=i
        this.cateLevel2=this.cateList[i].children
        this.scrollTop=this.scrollTop===0?1:0
      },
      gotoGoodsList(item3){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?cid='+item3.cat_id
        })
      },
      gotoSearch(){
       uni.navigateTo({
         url:'../../subpkg/search/search'
       })
      }
    }
	}
</script>

<style lang="scss">
.scroll-view-container{
  display: flex;
  .left-scroll-view{
    width: 120px;
    .left-scroll-view-item{
      line-height: 60px;
      text-align: center;
      font-size: 12px;
      background-color: #f7f7f7;
      &.active{
        background-color: #ffffff;
        position: relative;
        &::before{
          content: ' ';
          width: 3px;
          display: block;
          height: 35px;
          background-color: #c00000;
          position: absolute;
          top: 50%;
          transform: translateY(-50%);
        }
      }
    }
  }
}
.cate-lv2-title{
  font-size: 14px;
  font-weight: bold;
  text-align: center;
  padding: 15px 0;
}
.cate-lv2-list{
  display: flex;
  flex-wrap: wrap;
  .cate-lv2-item{
    width: 33.33%;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 6px;
    image{
      width: 60px;
      height: 60px;
    }
    text{
      font-size: 12px;
    }
  }
}
</style>
